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Full text of "The manufacture and properties of iron and steel"

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154                        METALLURGY OF IRON AND STEEL.
Steam accompanying 1 c. m. gas (determined) c. m .......            0.0375
Calorific value per cubic metre, calories ..................       1260
Carbon in one cubic metre dry gas, kg ........... ........            0.1689
Carbon in gas per kg. of coal (0.75680.0190) kg ........            0.7374
Volume of gas per kg. of coal (0.7378-5-0.1689) c. m. (dry)            4.37
Volume of dry gas per 200 kg. coal, c. m .................         874
Calorific value of gas per 200 kg. of coal, calories ........ 1,101,240
Products of dry distillation of 1 kg. coal (assumed).
COa   0.026 kg.=0.013 c. m. CO    0.027 kg.=0.022 c. m. GIL   0.082 kg.=0.114 c. m. CsH* 0.033 kg.=0.026 c. m. H    0.0098 kg.=0.109 c. in.
Volume of COa in gas per kg. of coal (0.057x4.37) c. m...            0.249
Volume of COa from distillation of 1 kg. coal, c. m ........            0.013
Volume of CG-2 produced by combustion, per kg. coal, c. m.            0.236 Volume of COa produced by combustion per 200 kg. coal,
' c. m ................................................          47.2
Heat of formation of 47.2 c. m. C02 calories ..............   207,300
Volume of CO in gas per kg. of coal (0.22x4.37) c. m .....            0.961
Volume of CO from distillation of 1 kg. coal, c. m ........            0.022
Volume of CO produced by combustion, per kg. coal, c. m.            0.939 Volume of CO produced by combustion per 200 kg. coal,
c. m ......... ". ......................................         187.8
Heat of formation of 187.8 c. m. CO, calories .......... ...   248,460
Total neat created in producer per 200 kg. coal, calories..   455,760
Temperature of gas leaving the producer, degrees Cent.. .         655
Mean specific heat of dry gas (20 to 655)  (calculated) . . .          0.3468 Sensible heat in dry gases per 200 kg. coal ( 874 x. 3468x635) =192,470
Mean specific heat of steam (20 to 655 ) ...............            0.443
Sensible heat in steam per 200 kg. coal (0.0375x874x0.443
X635)   ............... . ........ . ......... ...........     =9280
Total sensible heat in gas and steam per 200 kg. coal calo-
ries ................................................   201,750
Volume of free H in gas per kg. of coal (0.105x4.37) c. m.            0.459
Volume of free H from distillation of 1 kg. coal, c. m .....            0.109
Volume of free H from decomposition of HaO in producer,
c. m ...............................................            0.35
Volume of free H from decomposition of HaO per 200 kg.
coal, c. m ................... , ..................... . .          70
Weight of H liberated from HaO per 200 kg. coal, kg ......            6.3
Heat thus absorbed in decomposing steam, calories ......   182,700
Total weight H in 1 c. m. gas, including steam, kg .......            0.0186
Weight H in gas per 200 kg. coal, kg. (0.0186x874) ......          16
Weight H in 200 kg. coal (200x0.045), kg .................            9
Weight H coming from air and steam, per 200 kg. coal, kg.            7 Weight HsO coming from air and steam, per -200 kg. coal,
kg .................................................          63
Weight HaO coming from air used, at average conditions,
kg ......... . .......................................            9.6
Weight steam blown in, per 200 kg. coal, kg ..............          53.4
Weight of steam decomposed in producer (6.3x9), kg...          56.7
Deduct moisture of air, assumed all decomposed, kg ......            9.6
Steam of steam jet decomposed, per 200 kg. coal, kg .....          47.1
Percentage of steam in steam Jet decomposed    -TI